completed the inner triangle (circumscribed). Everything seems good.
I dont have a tubing notcher so I used the grinder. It took a while and was a PITA, but it all turned out well. The front gusset is 3/16" mild. Welding the tubing should be done in short lengths, about 3" or so to prevent warping and what not.
What I shouldv'e done was make a simple jig to clamp everything to (like a the two far ends clamped to a piece of wood, like a 2x4)..... but, I'm a ******* and the bar move a little. they're still square (amazing) they just got close together. No worries, it actually worked out better.